Globally Observed Teleconnections and their role and representation
in Hierarchies of Atmospheric Models
GOTHAM represents an ambitious research programme to gain robust, relevant and transferable knowledge of past and present day patterns and trends of regional climate extremes and variability of vulnerable areas identified by the IPCC, including the tropics and high-latitudes. It will achieve this by identifying the influence of remote drivers, or teleconnections, on regional climate variability, and assessing their relative impact.[more]
Work package 3:Understanding the dynamics, predictability and mid-to-high latitudes teleconnections of extreme El Niño events (lead by F. Lott and E. Guilyardi)

In the future climate, there are good chances that the El-Ninos will more often reach the extreme phases encountered a few times in the early

past (e.g 1995-1996). As El-Nino has significant regional impacts at mid-latitudes it becomes essential to analyse possible precursors and the

midlatitude impacts of these extreme El-Nino. This will be the goal of WP3, where hierarchies of models will be used to address these issues. For

the precursors, coupled atmosphere ocean model experiments with initialized oceanic conditions will be made.

For addressing impact, these experiments will be combined with atmosphere only simulations where the El-Nino extremes will be imposed via surface

Temperature anomalies, and where different pathways between the equatorial regions and the midlatitudes will be analysed through sensitivity